DandD

["Pete Myers" <Pete.Myers@tdh.state.tx.us>]

Folks:

Someone had asked about DandD ... just received some training on it 
from Ralph Cady, a hydrogeologist from NRC.  Some point he made were:

1. Version 1 has some bugs.

2. The only viable models in Version 1 are for building occupancy and
residential scenarios.

3. Version 2 (less bugs & stochastic) will be out Summer '00.

4. DandD (referred to as "Dandy") is designed for screening (using 
generic scenarios and default parameters) for demonstrating compli- 
ance with 10 CFR 20 Subpart E.  More restrictive screening is allowed 
by modification of scenarios by changing or eliminating pathways and 
input of site-specific parameters.  DandD was not designed and is not 
intended for use in establishing cleanup levels.

Ralph "on-the-road-a-lot" Cady (rec2@nrc.gov) can talk about the 
mechanics of the software.  He emphasized, however, that "guidance" 
on the application of the software is being developed by NRC's NMSS.

Pete Myers, Deputy Division Director, Licensing
Division of Licensing, Registration and Standards
Bureau of Radiation Control, Texas Department of Health
Phone (512) 834-6688 (FAX (512) 834-6690)
Pete.Myers@tdh.state.tx.us
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